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457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
be81c8a1 DK |
2 | /* |
3 | * EFI support for Xen. | |
4 | * | |
5 | * Copyright (C) 1999 VA Linux Systems | |
6 | * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> | |
7 | * Copyright (C) 1999-2002 Hewlett-Packard Co. | |
8 | * David Mosberger-Tang <davidm@hpl.hp.com> | |
9 | * Stephane Eranian <eranian@hpl.hp.com> | |
10 | * Copyright (C) 2005-2008 Intel Co. | |
11 | * Fenghua Yu <fenghua.yu@intel.com> | |
12 | * Bibo Mao <bibo.mao@intel.com> | |
13 | * Chandramouli Narayanan <mouli@linux.intel.com> | |
14 | * Huang Ying <ying.huang@intel.com> | |
15 | * Copyright (C) 2011 Novell Co. | |
16 | * Jan Beulich <JBeulich@suse.com> | |
17 | * Copyright (C) 2011-2012 Oracle Co. | |
18 | * Liang Tang <liang.tang@oracle.com> | |
19 | * Copyright (c) 2014 Oracle Co., Daniel Kiper | |
20 | */ | |
21 | ||
22 | #include <linux/bug.h> | |
23 | #include <linux/efi.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/string.h> | |
26 | ||
27 | #include <xen/interface/xen.h> | |
28 | #include <xen/interface/platform.h> | |
29 | #include <xen/xen.h> | |
e371fd76 | 30 | #include <xen/xen-ops.h> |
be81c8a1 | 31 | |
342cd340 DK |
32 | #include <asm/page.h> |
33 | ||
be81c8a1 DK |
34 | #include <asm/xen/hypercall.h> |
35 | ||
36 | #define INIT_EFI_OP(name) \ | |
37 | {.cmd = XENPF_efi_runtime_call, \ | |
38 | .u.efi_runtime_call.function = XEN_EFI_##name, \ | |
39 | .u.efi_runtime_call.misc = 0} | |
40 | ||
41 | #define efi_data(op) (op.u.efi_runtime_call) | |
42 | ||
a62ed500 | 43 | efi_status_t xen_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc) |
be81c8a1 DK |
44 | { |
45 | struct xen_platform_op op = INIT_EFI_OP(get_time); | |
46 | ||
cfafae94 | 47 | if (HYPERVISOR_platform_op(&op) < 0) |
be81c8a1 DK |
48 | return EFI_UNSUPPORTED; |
49 | ||
50 | if (tm) { | |
51 | BUILD_BUG_ON(sizeof(*tm) != sizeof(efi_data(op).u.get_time.time)); | |
52 | memcpy(tm, &efi_data(op).u.get_time.time, sizeof(*tm)); | |
53 | } | |
54 | ||
55 | if (tc) { | |
56 | tc->resolution = efi_data(op).u.get_time.resolution; | |
57 | tc->accuracy = efi_data(op).u.get_time.accuracy; | |
58 | tc->sets_to_zero = !!(efi_data(op).misc & | |
59 | XEN_EFI_GET_TIME_SET_CLEARS_NS); | |
60 | } | |
61 | ||
62 | return efi_data(op).status; | |
63 | } | |
a62ed500 | 64 | EXPORT_SYMBOL_GPL(xen_efi_get_time); |
be81c8a1 | 65 | |
a62ed500 | 66 | efi_status_t xen_efi_set_time(efi_time_t *tm) |
be81c8a1 DK |
67 | { |
68 | struct xen_platform_op op = INIT_EFI_OP(set_time); | |
69 | ||
70 | BUILD_BUG_ON(sizeof(*tm) != sizeof(efi_data(op).u.set_time)); | |
71 | memcpy(&efi_data(op).u.set_time, tm, sizeof(*tm)); | |
72 | ||
cfafae94 | 73 | if (HYPERVISOR_platform_op(&op) < 0) |
be81c8a1 DK |
74 | return EFI_UNSUPPORTED; |
75 | ||
76 | return efi_data(op).status; | |
77 | } | |
a62ed500 | 78 | EXPORT_SYMBOL_GPL(xen_efi_set_time); |
be81c8a1 | 79 | |
a62ed500 SZ |
80 | efi_status_t xen_efi_get_wakeup_time(efi_bool_t *enabled, efi_bool_t *pending, |
81 | efi_time_t *tm) | |
be81c8a1 DK |
82 | { |
83 | struct xen_platform_op op = INIT_EFI_OP(get_wakeup_time); | |
84 | ||
cfafae94 | 85 | if (HYPERVISOR_platform_op(&op) < 0) |
be81c8a1 DK |
86 | return EFI_UNSUPPORTED; |
87 | ||
88 | if (tm) { | |
89 | BUILD_BUG_ON(sizeof(*tm) != sizeof(efi_data(op).u.get_wakeup_time)); | |
90 | memcpy(tm, &efi_data(op).u.get_wakeup_time, sizeof(*tm)); | |
91 | } | |
92 | ||
93 | if (enabled) | |
94 | *enabled = !!(efi_data(op).misc & XEN_EFI_GET_WAKEUP_TIME_ENABLED); | |
95 | ||
96 | if (pending) | |
97 | *pending = !!(efi_data(op).misc & XEN_EFI_GET_WAKEUP_TIME_PENDING); | |
98 | ||
99 | return efi_data(op).status; | |
100 | } | |
a62ed500 | 101 | EXPORT_SYMBOL_GPL(xen_efi_get_wakeup_time); |
be81c8a1 | 102 | |
a62ed500 | 103 | efi_status_t xen_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm) |
be81c8a1 DK |
104 | { |
105 | struct xen_platform_op op = INIT_EFI_OP(set_wakeup_time); | |
106 | ||
107 | BUILD_BUG_ON(sizeof(*tm) != sizeof(efi_data(op).u.set_wakeup_time)); | |
108 | if (enabled) | |
109 | efi_data(op).misc = XEN_EFI_SET_WAKEUP_TIME_ENABLE; | |
110 | if (tm) | |
111 | memcpy(&efi_data(op).u.set_wakeup_time, tm, sizeof(*tm)); | |
112 | else | |
113 | efi_data(op).misc |= XEN_EFI_SET_WAKEUP_TIME_ENABLE_ONLY; | |
114 | ||
cfafae94 | 115 | if (HYPERVISOR_platform_op(&op) < 0) |
be81c8a1 DK |
116 | return EFI_UNSUPPORTED; |
117 | ||
118 | return efi_data(op).status; | |
119 | } | |
a62ed500 | 120 | EXPORT_SYMBOL_GPL(xen_efi_set_wakeup_time); |
be81c8a1 | 121 | |
a62ed500 SZ |
122 | efi_status_t xen_efi_get_variable(efi_char16_t *name, efi_guid_t *vendor, |
123 | u32 *attr, unsigned long *data_size, | |
124 | void *data) | |
be81c8a1 DK |
125 | { |
126 | struct xen_platform_op op = INIT_EFI_OP(get_variable); | |
127 | ||
128 | set_xen_guest_handle(efi_data(op).u.get_variable.name, name); | |
129 | BUILD_BUG_ON(sizeof(*vendor) != | |
130 | sizeof(efi_data(op).u.get_variable.vendor_guid)); | |
131 | memcpy(&efi_data(op).u.get_variable.vendor_guid, vendor, sizeof(*vendor)); | |
132 | efi_data(op).u.get_variable.size = *data_size; | |
133 | set_xen_guest_handle(efi_data(op).u.get_variable.data, data); | |
134 | ||
cfafae94 | 135 | if (HYPERVISOR_platform_op(&op) < 0) |
be81c8a1 DK |
136 | return EFI_UNSUPPORTED; |
137 | ||
138 | *data_size = efi_data(op).u.get_variable.size; | |
139 | if (attr) | |
140 | *attr = efi_data(op).misc; | |
141 | ||
142 | return efi_data(op).status; | |
143 | } | |
a62ed500 | 144 | EXPORT_SYMBOL_GPL(xen_efi_get_variable); |
be81c8a1 | 145 | |
a62ed500 SZ |
146 | efi_status_t xen_efi_get_next_variable(unsigned long *name_size, |
147 | efi_char16_t *name, | |
148 | efi_guid_t *vendor) | |
be81c8a1 DK |
149 | { |
150 | struct xen_platform_op op = INIT_EFI_OP(get_next_variable_name); | |
151 | ||
152 | efi_data(op).u.get_next_variable_name.size = *name_size; | |
153 | set_xen_guest_handle(efi_data(op).u.get_next_variable_name.name, name); | |
154 | BUILD_BUG_ON(sizeof(*vendor) != | |
155 | sizeof(efi_data(op).u.get_next_variable_name.vendor_guid)); | |
156 | memcpy(&efi_data(op).u.get_next_variable_name.vendor_guid, vendor, | |
157 | sizeof(*vendor)); | |
158 | ||
cfafae94 | 159 | if (HYPERVISOR_platform_op(&op) < 0) |
be81c8a1 DK |
160 | return EFI_UNSUPPORTED; |
161 | ||
162 | *name_size = efi_data(op).u.get_next_variable_name.size; | |
163 | memcpy(vendor, &efi_data(op).u.get_next_variable_name.vendor_guid, | |
164 | sizeof(*vendor)); | |
165 | ||
166 | return efi_data(op).status; | |
167 | } | |
a62ed500 | 168 | EXPORT_SYMBOL_GPL(xen_efi_get_next_variable); |
be81c8a1 | 169 | |
a62ed500 SZ |
170 | efi_status_t xen_efi_set_variable(efi_char16_t *name, efi_guid_t *vendor, |
171 | u32 attr, unsigned long data_size, | |
172 | void *data) | |
be81c8a1 DK |
173 | { |
174 | struct xen_platform_op op = INIT_EFI_OP(set_variable); | |
175 | ||
176 | set_xen_guest_handle(efi_data(op).u.set_variable.name, name); | |
177 | efi_data(op).misc = attr; | |
178 | BUILD_BUG_ON(sizeof(*vendor) != | |
179 | sizeof(efi_data(op).u.set_variable.vendor_guid)); | |
180 | memcpy(&efi_data(op).u.set_variable.vendor_guid, vendor, sizeof(*vendor)); | |
181 | efi_data(op).u.set_variable.size = data_size; | |
182 | set_xen_guest_handle(efi_data(op).u.set_variable.data, data); | |
183 | ||
cfafae94 | 184 | if (HYPERVISOR_platform_op(&op) < 0) |
be81c8a1 DK |
185 | return EFI_UNSUPPORTED; |
186 | ||
187 | return efi_data(op).status; | |
188 | } | |
a62ed500 | 189 | EXPORT_SYMBOL_GPL(xen_efi_set_variable); |
be81c8a1 | 190 | |
a62ed500 SZ |
191 | efi_status_t xen_efi_query_variable_info(u32 attr, u64 *storage_space, |
192 | u64 *remaining_space, | |
193 | u64 *max_variable_size) | |
be81c8a1 DK |
194 | { |
195 | struct xen_platform_op op = INIT_EFI_OP(query_variable_info); | |
196 | ||
197 | if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION) | |
198 | return EFI_UNSUPPORTED; | |
199 | ||
200 | efi_data(op).u.query_variable_info.attr = attr; | |
201 | ||
cfafae94 | 202 | if (HYPERVISOR_platform_op(&op) < 0) |
be81c8a1 DK |
203 | return EFI_UNSUPPORTED; |
204 | ||
205 | *storage_space = efi_data(op).u.query_variable_info.max_store_size; | |
206 | *remaining_space = efi_data(op).u.query_variable_info.remain_store_size; | |
207 | *max_variable_size = efi_data(op).u.query_variable_info.max_size; | |
208 | ||
209 | return efi_data(op).status; | |
210 | } | |
a62ed500 | 211 | EXPORT_SYMBOL_GPL(xen_efi_query_variable_info); |
be81c8a1 | 212 | |
a62ed500 | 213 | efi_status_t xen_efi_get_next_high_mono_count(u32 *count) |
be81c8a1 DK |
214 | { |
215 | struct xen_platform_op op = INIT_EFI_OP(get_next_high_monotonic_count); | |
216 | ||
cfafae94 | 217 | if (HYPERVISOR_platform_op(&op) < 0) |
be81c8a1 DK |
218 | return EFI_UNSUPPORTED; |
219 | ||
220 | *count = efi_data(op).misc; | |
221 | ||
222 | return efi_data(op).status; | |
223 | } | |
a62ed500 | 224 | EXPORT_SYMBOL_GPL(xen_efi_get_next_high_mono_count); |
be81c8a1 | 225 | |
a62ed500 SZ |
226 | efi_status_t xen_efi_update_capsule(efi_capsule_header_t **capsules, |
227 | unsigned long count, unsigned long sg_list) | |
be81c8a1 DK |
228 | { |
229 | struct xen_platform_op op = INIT_EFI_OP(update_capsule); | |
230 | ||
231 | if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION) | |
232 | return EFI_UNSUPPORTED; | |
233 | ||
234 | set_xen_guest_handle(efi_data(op).u.update_capsule.capsule_header_array, | |
235 | capsules); | |
236 | efi_data(op).u.update_capsule.capsule_count = count; | |
237 | efi_data(op).u.update_capsule.sg_list = sg_list; | |
238 | ||
cfafae94 | 239 | if (HYPERVISOR_platform_op(&op) < 0) |
be81c8a1 DK |
240 | return EFI_UNSUPPORTED; |
241 | ||
242 | return efi_data(op).status; | |
243 | } | |
a62ed500 | 244 | EXPORT_SYMBOL_GPL(xen_efi_update_capsule); |
be81c8a1 | 245 | |
a62ed500 SZ |
246 | efi_status_t xen_efi_query_capsule_caps(efi_capsule_header_t **capsules, |
247 | unsigned long count, u64 *max_size, | |
248 | int *reset_type) | |
be81c8a1 DK |
249 | { |
250 | struct xen_platform_op op = INIT_EFI_OP(query_capsule_capabilities); | |
251 | ||
252 | if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION) | |
253 | return EFI_UNSUPPORTED; | |
254 | ||
255 | set_xen_guest_handle(efi_data(op).u.query_capsule_capabilities.capsule_header_array, | |
256 | capsules); | |
257 | efi_data(op).u.query_capsule_capabilities.capsule_count = count; | |
258 | ||
cfafae94 | 259 | if (HYPERVISOR_platform_op(&op) < 0) |
be81c8a1 DK |
260 | return EFI_UNSUPPORTED; |
261 | ||
262 | *max_size = efi_data(op).u.query_capsule_capabilities.max_capsule_size; | |
263 | *reset_type = efi_data(op).u.query_capsule_capabilities.reset_type; | |
264 | ||
265 | return efi_data(op).status; | |
266 | } | |
a62ed500 | 267 | EXPORT_SYMBOL_GPL(xen_efi_query_capsule_caps); |
e371fd76 JG |
268 | |
269 | void xen_efi_reset_system(int reset_type, efi_status_t status, | |
270 | unsigned long data_size, efi_char16_t *data) | |
271 | { | |
272 | switch (reset_type) { | |
273 | case EFI_RESET_COLD: | |
274 | case EFI_RESET_WARM: | |
275 | xen_reboot(SHUTDOWN_reboot); | |
276 | break; | |
277 | case EFI_RESET_SHUTDOWN: | |
278 | xen_reboot(SHUTDOWN_poweroff); | |
279 | break; | |
280 | default: | |
281 | BUG(); | |
282 | } | |
283 | } | |
284 | EXPORT_SYMBOL_GPL(xen_efi_reset_system); |